Device for molding concrete and other plastic materials.



No. 871,390. PATENTED NOV. 19, 1907.

' c. DIETRICHS.

DEVICE FOR MOLDING CONCRETE AND OTHER PLASTIC MATERIALS. APPLIOATIONHLED 5211.20.1907.

INVENTOI? CHARLES DIETRICHS, OF L11 TLE FERRY, NEW JERSEY.

DEVICE FOR MOLDING- CONCRETEAND OTHER PLASTIC MATERIALS.

Specification of Letters Patent.

Patented Nov. 19, 1907.

v Application filed April 20- 1907. Serial No. 369.271.

To all whom it may concern:

Be it known that I, CHARLEs DiE'rmcns, a citizen of the United States,residingat Little Ferry, county of Bergenyand State of N ewJJ ersey,have invented a new and useful Improvement in Devices for MoldingConcrete and other Plastic Materials, of-which the following is aspecification.

This invention relates to devices for molding oncre'te and otherplasticmaterials'and has for its object the provision of simple and efi'ectivemeans for securing the boards or other, side pieces of a mold in theformation of lwalls. oconcrete-or other plastic materia s.

In constructing walls of concrete and the like the ordinary practice isto form a mold of boards or plank arranged horizontally and securedrigidly so as to present a receiving space of uniform width throughout.The mold is usually extended upward as the construction of the wallprogresses and the means os dinarily employed to secure the i to easydisengagement boards or plank in position are pieces of studding towhich the boards are nailed, the studding members being braced from theoutside in any desired manner. of holding the side members of the moldis objectionable because it makes it practically irn ossible to use theboards or plank a secon, time and, therefore, renders the cost of aconcrete wall considerably greater than it would be if thelumberemployed in forming the mold could be advantageously used again. Variousdevices for securing the boards which form the sides of the mold havebeen proposed, but most of these de vices are either too expensive infirst-cost or too difficult to adjust properly without considerable;loss of time. It is, of course, essential that devices which are to beused in securing theside members of molds for con crete structuresshould be sim le in design, inexpensive in construction anrlbf suchcharacter that they can be easily operated by unskilled laborers. It isalso necessary that they should hold the mold members with perfootseo'urity'iwhen-in use but be susceptible when it is desired to removethe mold members after the completion of the" wall. l

The present-invention isdesigned to afford a device adapted to meet allof the c0nditions enumerated, and in the accompanying l vice drawings Ihave illustrated one form o1 do- Vice embodying the present mvention.

This mode l l l in the drawings, in which corresponding parts are desinated by similar characters of reference in t e several views: Figure 1is a perspective view of a section of concrete wall in process ofconstruction, the side members of the mold being secured in place by thedevices forming the present invention, and aportion of the concrete ofthe wall being broken away to show the position of the stay rod therein;Fi 2 is a vertical section showing a portion oi concrete wall structurein the plane of one of the stay rods, showing the clamping action of thedevices upon the side members of the mold; Fig. 3 is a perspective viewof one of the devices for gripping the stayrods.

Referring to characters, the boards or used to form the side mom ers ofthe mold are designated 1 and each of these boards is provided near itsupper margin with a'plurality of slots 2 to receive and support thedevices for securing the boards in position. Each securing devicecomprises a stay rod 3 provided at each end with an eye 4, a grippingdevice for engagement with each eye, and meansassociated with eachgripping device lor clamping two boards placed one above another andholding them securely in alinement. Each of the devices which have thisdouble function is designated generally as 5 and comprises a plate 6having a laterally projecting lip 7 and pivoted member 8 carried by thelip 7 and a wedge 9 which cooperates with the plate 6 and the member 8-to clamp the boards 1.

The gripping of the tierods 3 is effected by means of a notch'lO formedin the lip 7 to receive the eye at the end of the tie rod and a hook 11formed on the pivoted member 8 and adapted, when the member 8 is inalinement with the tie rod, to extend through the e e of the tie rod, asshown in Fig. '2. ()n t 1e opposite side of the pivot upon which themember 8 turns a plurality of slots 12 are formed in the member 8 toreceive the wedge 9'. Several slots are provided in order that thedevice may be adapted for use with boards or plank of differentthickness.

he operation of the securing devices will be c car from aninspection ofFig. 2. The board which is to form the bottom tier of one side of themold is set in position. The de- 5 with the tie rod gripped therein isplaced in position with the member 8 extending through the slot 2 in theboard. A

board to form the second tier on that side of the mold then placed inposition upon the top of the board already placed and the wedge 9 isthen driven home through the siot 12. In this way the two boards areclamped together in perfect alinement. At the other end of the tie rod 3another one of the gripping devices is secured and the board to form thefirst tier of the other side of the mold is then placed in position withthe pivoted member 8 extending through the slot 2. Another board is thenplaced on top to form the second tier on that side of the mold and awedge isintroduced into the slot 12 and forced home to clamp the twoboards in proper relation. When the wedges are driven home the moldmembers at opposite sides of the mold are securely held and the tie rod3, being gripped at each end by the combined action of the hook 11 andthe slot in the supporting lip 7, the side members of the mold areaccurately spaced apart so as to aiiord a receiving space for theconcrete which is of definite width. As concrete is introduced into themold and tamped down, the mold members are not forced out of theirpositionnor can the tie rod become disengaged so as to permit the sreading of the,

mold members. As the wal is carried upward and it becomes necessary toprovide additional boards to extend the mold upward, the procedurealready described which is em ployed in securing the bottom members ofthe sides of the mold and the members immediately above is repeated asoften as may be necessary. it is not necessary to leave all the sidemembers of the mold in place until the wall is finished. The concretehardens or sets quite rapidly and as soon as the hardening has takenplace at the bottom of the wall the mold members adjacent tothe-hardened portion of the mass 'of concrete maybe removed and employedin extending the mold upward. The removal of the side members ofthe-mold after the concrete has set is effected by simply withdrawingthe wedges 9 from the slots in the members 8 and then removing theboards. As soon as both boards clamped by one of the securing deviceshave been removed the device can be detached from the tie rodby turningthe member 8 on its pivot and so disengaging the hook 11 from the eye inthe end of the tie rod. The tie rod 3 is left in position in theconcrete, and the openings left in the face of'the concrete by theremoval ofthe gripping devices are afterwards filled in with a mixtureof cement and sand which will match the surface of the wall.

From the foregoing description'it will be seen that the devices forsecuring the boards forming the sides of the mold can be easilyoperated; that they will clamp the boards."

firmly, so as to keep them in proper alinement; and that the tie rodswill be sojlield that the tamping of the concrete in the mold cannotdisengage the tie rods from the gripping members. The hooks and slots bymeans of which the tierods are gripped will be so formed thatpractically no-play is al-' It'will also be seen they can be readilyreplaced. The tie rods 30 themselves are prefera ly formed of Wire ofsuitable gage, but may be made of other material if desired. Wire isdesirable because of its cheapness and the ease with which it can beworked, as well as the degree of rigidit which a wire of comparativelysmall gage wi afford.

Having thus described my invention, What I claim as new and desire tosecure by Letters Patent, is: v v

1. In apparatus of the character specified, the combination of'a tie rodhavinga length des's than the thickness of the wall to be constructed,and devices for enga ement with the ends of the tie rod adapts to gripthe side pieces of a mold, saiddevices each com-' prising a clampingplate for contact with the inner face of the mold-member, a tie rodengaging member pivoted on said clam I plate, and means cooperatmg withsai' tie 40 rod engaging member to clamp a mold memher a ainst saidclamping plate.

2. n apparatus of the character specified, the combination ofa tie rodhaving alength less than the thickness of the wall to be constructed andhaving its ends bent for eng e ment with hooks, and devices 'compri fiihooks for engagement with the ends of said tie rod and means forclamping mold members, each of said devices comprising a clamping platefor engagement with the face of a mold member, a member ivoted on saidclamping plate and having a 00k for engagement with one end of the saidrod, and means cooperating with said pivoted member to l hold the saidmember in engagement With the tie rod and to clamp a mold member againstsaid clam ing plate.

3. A clamping (F concrete mold, comprising a clamping plate, a tonguerotatably secured to said plate, said tongue being slotted at a distancefrom the clamping plate to receive a wed ',e and adapted at the otherend to interlock-with astay rod, and a wedge for engagement-with saidslotted tongue 'to-c'l'ampthe mold member" ncl hold. the tongue in' engaement- Twi'th the stay rod.

A combined 0 amp and tiered securing Q levicefor. concrete molds,comprising a clamping plate, a pivoted tongue carried by evice for themembers of a plate to clamp a mold member.

' 5. The combination with a tie rod having an eye at the end, of adevice for gripping the tie rod and clamping the side members of aconcrete mold, said device com'prisin a plate adapted to form anabutment for t e mold members and having a lip disYosed at an anglevthereto, a member pivota ly mounted on said lip and having at one end ahook' adapted to engage the eye at one end of the 15 tie rod and havinga slot at the other end, and a wedge arranged in said slot and ada tedto jam the mold members against the a utment plat In testimony whereof,I have signed my 20 name in the presence of two witnesses.

CHARLES DIE RICHS.

Witnesses: I

BAXTER MORTON, H. RICHARD WOHSE.

